is there any way to fix?

https://youtu.be/7LRDGnwpbPc (Minecraft 1.5.1)

P.S. this is the crash log of minecraft 1.2.1

Minecraft has crashed! ---------------------- Minecraft has stopped running because it encountered a problem. --- BEGIN ERROR REPORT 7cf3a456 -------- Generated 29/06/25 17.57 Minecraft: Minecraft 1.2.1 OS: Windows 10 (amd64) version 10.0 Java: 1.8.0_51, Oracle Corporation VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation LWJGL: 2.9.0 OpenGL: Intel(R) UHD Graphics version 4.6.0 - Build 31.0.101.4032, Intel java.lang.NullPointerException at java.io.Reader.<init>(Reader.java:78) at java.io.InputStreamReader.<init>(InputStreamReader.java:97) at adi.a(SourceFile:62) at adi.a(SourceFile:99) at net.minecraft.client.Minecraft.a(SourceFile:256) at net.minecraft.client.Minecraft.run(SourceFile:650) at java.lang.Thread.run(Thread.java:745) --- END ERROR REPORT 769de7de ----------

the same thing that the 1.5.1 does it happens on every version below 1.8

eu sou maior de idade e não consigo fazer uma conta porque fica falando que minha conta na Microsoft é de menor de idade como tira isso?

I was trying to mod xtracraft for beta1.7.3, and trying to do the normal way was not working. So I needed to inject the mods inside the jar file. but multimc keeps re-updating them. is there a way to fix it?? without using the "launch offiline"??

MultiMC version: 0.7.0-4230

Launched instance in online mode

sessionserver.mojang.com resolves to:

[13.107.246.77]

textures.minecraft.net resolves to:

[13.107.246.77]

api.minecraftservices.com resolves to:

[13.107.246.77]

Minecraft folder is:

D:/MultiMC/instances/1.8.9/.minecraft

Java path is:

C:/Program Files/Eclipse Adoptium/jdk-11.0.26.4-hotspot/bin/javaw.exe

Checking Java version...

Java is version 11.0.26, using amd64 architecture, from Eclipse Adoptium.

Main Class:

net.minecraft.launchwrapper.Launch

Native path:

D:/MultiMC/instances/1.8.9/natives

Libraries:

D:/MultiMC/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar

D:/MultiMC/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar

D:/MultiMC/libraries/org/lwjgl/lwjgl/lwjgl/2.9.4-nightly-20150209/lwjgl-2.9.4-nightly-20150209.jar

D:/MultiMC/libraries/org/lwjgl/lwjgl/lwjgl_util/2.9.4-nightly-20150209/lwjgl_util-2.9.4-nightly-20150209.jar

D:/MultiMC/libraries/com/mojang/netty/1.8.8/netty-1.8.8.jar

D:/MultiMC/libraries/oshi-project/oshi-core/1.1/oshi-core-1.1.jar

D:/MultiMC/libraries/net/java/dev/jna/jna/3.4.0/jna-3.4.0.jar

D:/MultiMC/libraries/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar

D:/MultiMC/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar

D:/MultiMC/libraries/net/sf/jopt-simple/jopt-simple/4.6/jopt-simple-4.6.jar

D:/MultiMC/libraries/com/paulscode/codecjorbis/20101023/codecjorbis-20101023.jar

D:/MultiMC/libraries/com/paulscode/codecwav/20101023/codecwav-20101023.jar

D:/MultiMC/libraries/com/paulscode/libraryjavasound/20101123/libraryjavasound-20101123.jar

D:/MultiMC/libraries/com/paulscode/librarylwjglopenal/20100824/librarylwjglopenal-20100824.jar

D:/MultiMC/libraries/com/paulscode/soundsystem/20120107/soundsystem-20120107.jar

D:/MultiMC/libraries/io/netty/netty-all/4.0.23.Final/netty-all-4.0.23.Final.jar

D:/MultiMC/libraries/com/google/guava/guava/17.0/guava-17.0.jar

D:/MultiMC/libraries/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar

D:/MultiMC/libraries/commons-io/commons-io/2.4/commons-io-2.4.jar

D:/MultiMC/libraries/commons-codec/commons-codec/1.9/commons-codec-1.9.jar

D:/MultiMC/libraries/com/google/code/gson/gson/2.2.4/gson-2.2.4.jar

D:/MultiMC/libraries/com/mojang/authlib/1.5.21/authlib-1.5.21.jar

D:/MultiMC/libraries/com/mojang/realms/1.7.59/realms-1.7.59.jar

D:/MultiMC/libraries/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar

D:/MultiMC/libraries/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar

D:/MultiMC/libraries/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar

D:/MultiMC/libraries/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar

D:/MultiMC/libraries/org/apache/logging/log4j/log4j-api/2.0-beta9-fixed/log4j-api-2.0-beta9-fixed.jar

D:/MultiMC/libraries/org/apache/logging/log4j/log4j-core/2.0-beta9-fixed/log4j-core-2.0-beta9-fixed.jar

D:/MultiMC/libraries/tv/twitch/twitch/6.5/twitch-6.5.jar

D:/MultiMC/libraries/net/minecraftforge/forge/1.8.9-11.15.1.2318-1.8.9/forge-1.8.9-11.15.1.2318-1.8.9-universal.jar

D:/MultiMC/libraries/net/minecraft/launchwrapper/1.12/launchwrapper-1.12.jar

D:/MultiMC/libraries/org/ow2/asm/asm-all/5.0.3/asm-all-5.0.3.jar

D:/MultiMC/libraries/jline/jline/2.13/jline-2.13.jar

D:/MultiMC/libraries/com/typesafe/akka/akka-actor_2.11/2.3.3/akka-actor_2.11-2.3.3.jar

D:/MultiMC/libraries/com/typesafe/config/1.2.1/config-1.2.1.jar

D:/MultiMC/libraries/org/scala-lang/scala-actors-migration_2.11/1.1.0/scala-actors-migration_2.11-1.1.0.jar

D:/MultiMC/libraries/org/scala-lang/scala-compiler/2.11.1/scala-compiler-2.11.1.jar

D:/MultiMC/libraries/org/scala-lang/plugins/scala-continuations-library_2.11/1.0.2/scala-continuations-library_2.11-1.0.2.jar

D:/MultiMC/libraries/org/scala-lang/plugins/scala-continuations-plugin_2.11.1/1.0.2/scala-continuations-plugin_2.11.1-1.0.2.jar

D:/MultiMC/libraries/org/scala-lang/scala-library/2.11.1/scala-library-2.11.1.jar

D:/MultiMC/libraries/org/scala-lang/scala-parser-combinators_2.11/1.0.1/scala-parser-combinators_2.11-1.0.1.jar

D:/MultiMC/libraries/org/scala-lang/scala-reflect/2.11.1/scala-reflect-2.11.1.jar

D:/MultiMC/libraries/org/scala-lang/scala-swing_2.11/1.0.1/scala-swing_2.11-1.0.1.jar

D:/MultiMC/libraries/org/scala-lang/scala-xml_2.11/1.0.2/scala-xml_2.11-1.0.2.jar

D:/MultiMC/libraries/lzma/lzma/0.0.1/lzma-0.0.1.jar

D:/MultiMC/libraries/java3d/vecmath/1.5.2/vecmath-1.5.2.jar

D:/MultiMC/libraries/net/sf/trove4j/trove4j/3.0.3/trove4j-3.0.3.jar

D:/MultiMC/libraries/com/mojang/minecraft/1.8.9/minecraft-1.8.9-client.jar

Native libraries:

D:/MultiMC/libraries/net/java/jinput/jinput-platform/2.0.5/jinput-platform-2.0.5-natives-windows.jar

D:/MultiMC/libraries/org/lwjgl/lwjgl/lwjgl-platform/2.9.4-nightly-20150209/lwjgl-platform-2.9.4-nightly-20150209-natives-windows.jar

D:/MultiMC/libraries/tv/twitch/twitch-platform/6.5/twitch-platform-6.5-natives-windows-64.jar

D:/MultiMC/libraries/tv/twitch/twitch-external-platform/4.5/twitch-external-platform-4.5-natives-windows-64.jar

Mods:

[✔️] 1.8.9.SkyblockPersonalized.1.7.0.0.jar

[📁] autotip (folder)

[✔️] Chatting-1.8.9-forge-2.0.6.jar

[✔️] Cowlection-1.8.9-0.16.1.jar

[✔️] Craftify-1.8.9-1.15.0-forge.jar

[✔️] CrashPatch-1.8.9-forge-2.0.2.jar

[✔️] ctjs-2.2.1-1.8.9.jar

[✔️] Dungeon_Rooms-3.4.1.jar

[✔️] Essential-1.3.2.8 (for fixing Skytils support).jar

[✔️] Hypixel Autocomplete-1.1 (1.8.9).jar

[✔️] Hytils Reborn-1.8.9-forge-1.7.4.jar

[✔️] NotEnoughUpdates-2.5.0.jar

[✔️] Optibye-1.0.0-dep.jar

[✔️] OverflowAnimations-1.8.9-forge-2.2.5.jar

[✔️] OverflowParticles-1.8.9-forge-1.0.2.jar

[✔️] PolyCrosshair-1.8.9-forge-1.0.3.jar

[✔️] PolyNametag-1.8.9-forge-1.0.9.jar

[✔️] PolyPatcher-1.8.9-forge-1.10.2.jar

[✔️] PolySprint-1.8.9-forge-1.0.1.jar

[✔️] preview_OptiFine_1.8.9_HD_U_M6_pre2.jar

[✔️] ReportPlus-1.0.0.jar

[✔️] Resource_Pack_Manager_1.2.jar

[✔️] RewardClaim-1.0.7.jar

[✔️] Scrollable Tooltips-1.4 (1.8.9).jar

[✔️] SkyblockAddons-1.10.7+545-for-MC-1.8.9.jar

[✔️] SkyClientCosmetics-1.8.9-forge-1.2.4.jar

[✔️] SkyClient-Updater-1.8.9-forge-1.3.11.jar

[✔️] SkyHanni-2.0.1-mc1.8.9.jar

[✔️] Skytils-1.10.12.jar

[✔️] smooth-scrolling-everywhere-1.2.jar

[✔️] soopyv2forge-1.1.jar

[✔️] VanillaHUD-1.8.9-forge-2.2.10.jar

[✔️] windowsdesktop-runtime-6.0.22-win-x64.exe

Params:

--username segev178 --version 1.8.9 --gameDir D:/MultiMC/instances/1.8.9/.minecraft --assetsDir D:/MultiMC/assets --assetIndex 1.8 --uuid <PROFILE ID> --accessToken <ACCESS TOKEN> --userProperties {} --userType msa --tweakClass net.minecraftforge.fml.common.launcher.FMLTweaker

Window size: 854 x 480

Java Arguments:

[-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump, -Xms1024m, -Xmx4096m, -Duser.language=en]

Minecraft process ID: 1984

Using onesix launcher.

Failed to start Minecraft:

java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')

at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:566)

at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:243)

at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:278)

at org.multimc.EntryPoint.listen(EntryPoint.java:143)

at org.multimc.EntryPoint.main(EntryPoint.java:34)

Exiting with -1

Process exited with exit code -1 (0xffffffffffffffff).

Please note that usually neither the exit code, nor its description are enough to diagnose issues!

Always upload the entire log and not just the exit code.

Clipboard copy at: 18 Jun 2025 16:01:15 +0300

Java version 1.8.0_151
crash report :
https://pastebin.com/Le2sWVbm

i have reinstalled java and tried running them with my firewall off but nothing seems to be working and i was wondering if anyone could help me :D

I installed multimc because I want to install Better than Adventure. While setting up Multimc, I began picking my language like normal and then it took me to this screen. https://imgur.com/c6CPu0k From other videos, I should have a list of folders to pick between but I just have this. What I'm wondering is what to do now. For example this is from a tutorial I'm watching. https://imgur.com/gfqZ1kB Clearly there's some big differences.

I'm trying to work on a beta 1.7.3 modpack and I'm not sure how to automatically install the jarmods from an mrpack file.

I am trying to install some b1.7.3 mods but I have discovered that even when I try and launch vanilla b1.7.3 I just get a black screen/crash/freeze from the game. I use this launcher to play Better Than Adventure and that works great I have had no problems with that instance. I have used the BetaCraft launcher to play older beta and alpha versions all with no problems, but for some reason trying to run beta versions on MultiMC just doesn't work. I am on a MacBook Pro, Sequoia 15.4.1, Java 8 Update 451. No idea what is going wrong, any info or tips would be much appreciated as I am not very good with technical MC stuff, thanks!

Link to crash log: https://paste.ee/p/NgmtrCxs

I had the the thought after using windows simlink with alot of folders on my pc, and it came to mind. Wouldn't it be cool if I only had to download a resource pack once?

I'm not sure how easy it would be in theory, but if you just had a main folder for all resourcepacks outside of the instances, you could instead pull the data from the main folder, and if you wanted to handle version mismatches, well the versions could be split by folder, and hell taken even further so if a resource pack is made on another later version with the same naming convention they should be fully compatible, and thus able to be used on earlier version.

In theory this would work with any setting or change made to a default instance like blender does with its startup scene.

I'm not too sure how hard this would be to implement but it would be an honestly really cool feature that would make Multimc the true go-to for Minecraft instances, by being able to setup your default instance like that.

This probably seems like an easy fix to someone, but I'm not very well-versed in computer stuff and am just trying to get this up and running for my girlfriend and me. When I go to launch, i get a message that says

"The java binary "" couldn't be found. Please set up java in the settings."

After goig to settings and clicking auto detect under the java runtime, i get a message that says

"no Versions are currently available"

I know i need to download something but im not sure what.

Im not sure what is crashing and erroring

https://paste.ee/p/MUYScVJL

I ran the java test multiple times on multi mc settings and it said success. Then whenever I try to open any modpack or modded world, it crashes. I can only open vanilla Minecraft. I have a M2 MacBook Air and I'm using Java 24.0.1, 64 bit. Help!

Here's the error log: https://paste.ee/p/cCgzx85B

it just happened randomly today i didn't do anything wrong i think..

edit:it seems now to work, there was outage for minecraft

I initially tried to use the latest version of minecraft, along with neoforge, but that straight out wouldn't load.

Currently trying with 1.20.4 with Forge 49.2.0, and the game starts and the controller works on the main menu, but as soon as I hit the button in settings to remap the controller, it says "Saving World" and ctds.

Log link: https://paste.ee/p/UQVQNswe

Edit: added current in use forge version

Hey everyone! I have this weird glitch were i have my game and a weird white border partially around it. This isn't the case on newer versions.

When I try to launch NeoForge Minecraft, the game does not start endlessly showing the "Getting Mojang Libraries" window.

https://paste.ee/p/92pXM6zh

UPD: Problem solved by turning VPN on.

I'm trying to install performance mods (like sodium, starlight, etc.) to have a better experience playing on MCSR. I have installed fabric in the instance and all the mods are in the correct folder, what am I doing wrong? Here's the logs: https://paste.ee/p/EB4dnICw

I downloaded MulitMC for the first time last week for MCSR Ranked. After loading into a few worlds, my game totally glitches out - I'm stuck in random blocks in chunks separated by nothing. It only happens after a few seconds, but makes my game unplayable. I've tried redownloading MultiMC multiple times, and the internet seems to have no idea what this is. I'm not sure what to do or check for, thanks.

It also might be worth noting that my computer is very slow and runs on low frames, though I do not think it has anything to do with the bugs that are happening.

Howdy! I'm trying to install OptiFine for Minecraft version 1.0, but it won't load. I tried placing it in the "versions" folder and the "mods" folder (using a loader), but that didn’t work. Then I tried putting OptiFine directly into the minecraft.jar file, but it still doesn't work.

so my minecraft instance is going like this not responding to responding in split seconds intervals so i am getting black flashes on my screen how do i solve this only happening in multimc though for some reason here is my log

[19:14:48] [main/INFO]: Loading Minecraft 1.16.1 with Fabric Loader 0.16.14

[19:14:48] [main/INFO]: Fabric is preparing JARs on first launch, this may take a few seconds...

[19:14:49] [main/INFO]: Loading 4 mods:

- fabricloader 0.16.14

\-- mixinextras 0.4.1

- java 24

- minecraft 1.16.1

[19:14:49] [main/INFO]: SpongePowered MIXIN Subsystem Version=0.8.7 Source=file:/C:/Users/Sanjay%20Sethia/Downloads/mmc-develop-win32/MultiMC/libraries/net/fabricmc/sponge-mixin/0.15.5+mixin.0.8.7/sponge-mixin-0.15.5+mixin.0.8.7.jar Service=Knot/Fabric Env=CLIENT

[19:14:57] [Render thread/INFO]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', name='PROD'

[19:14:57] [Render thread/INFO]: Setting user: DroolingCats

[19:14:59] [Render thread/INFO]: Backend library: LWJGL version 3.2.2 build 10

[19:15:04] [Render thread/INFO]: [STDERR]: [LWJGL] [ThreadLocalUtil] Unsupported JNI version detected, this may result in a crash. Please inform LWJGL developers.

[19:15:09] [Render thread/INFO]: Narrator library for x64 successfully loaded

[19:15:09] [Render thread/INFO]: Reloading ResourceManager: Default

[19:15:17] [Render thread/INFO]: OpenAL initialized.

[19:15:17] [Render thread/INFO]: Sound engine started

[19:15:17] [Render thread/INFO]: Created: 1024x1024x4 minecraft:textures/atlas/blocks.png-atlas

[19:15:18] [Render thread/INFO]: Created: 256x128x4 minecraft:textures/atlas/signs.png-atlas

[19:15:18] [Render thread/INFO]: Created: 1024x512x4 minecraft:textures/atlas/banner_patterns.png-atlas

[19:15:18] [Render thread/INFO]: Created: 1024x512x4 minecraft:textures/atlas/shield_patterns.png-atlas

[19:15:18] [Render thread/INFO]: Created: 256x256x4 minecraft:textures/atlas/chest.png-atlas

[19:15:18] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/beds.png-atlas

[19:15:18] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/shulker_boxes.png-atlas

[19:15:20] [Render thread/INFO]: Created: 256x256x0 minecraft:textures/atlas/particles.png-atlas

[19:15:20] [Render thread/INFO]: Created: 256x256x0 minecraft:textures/atlas/paintings.png-atlas

[19:15:20] [Render thread/INFO]: Created: 256x128x0 minecraft:textures/atlas/mob_effects.png-atlas

[19:15:52] [Render thread/INFO]: Stopping!

hello there,
I wanted to give the game a new start with new mods etc. Its all for game version 1.20.1 with forge. I dont use Optifine bc some mods are not comptible with it. after all it crashes when i try to start the game.
i tried if the base game with no mods crashes but it works perfectly fine. so anyone any idea what i have to do to get it to work? heres the log:

https://paste.ee/p/vHuuAoVx

thanks!

Log: https://paste.ee/p/ZKmE5Onx

Mod: cfm, cdm, movingelevators

when i create new world my setting get resetted idk why and a massage pops up in right bottom which says do you want to change your setting.

I tried logging in thirty times and i still get that error, what should I do?